Second attempt to fix the actions with UnexpectedImprovement(Skip)

In !119 (merged) a bugfix on the flow for tests reported as UnexpectedImprovement(Skip) was incomplete.

As it has to behave like a passing test (remove from fails and no addition to any other) it can be managed in that block instead in the next block where the flow is different.

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This reverts commit 10b80ae2.